320
FZUS54 KLCH 201820
CWFLCH

Coastal Waters Forecast
National Weather Service Lake Charles LA
1220 PM CST Thu Nov 20 2025

Coastal waters from the Lower Atchafalaya River LA to High
Island TX out 60 nautical miles including Sabine and
Calcasieu Lakes and Vermilion and Cote Blanche Bays

Seas are provided as a range of the average height of the
highest one third of the waves, along with the occasional
height of the average highest ten percent of the waves.

GMZ400-210700-
1220 PM CST Thu Nov 20 2025

.Synopsis for Lower Atchafalaya River LA to High Island TX out
60 NM including Sabine and Calcasieu Lakes and Vermilion and Cote
Blanche Bays...

Periods of breezy to moderate onshore flow will prevail over much
of the period with winds only turning offshore around the start of
next work week with the passage of a cold front system.

$$

GMZ430-210700-
Sabine Lake-
1220 PM CST Thu Nov 20 2025

.TONIGHT...Southeast winds 5 to 10 knots. Lake waters light chop.
Patchy fog late this evening and early morning. A slight chance
of showers after midnight.
.FRIDAY...South winds 5 to 10 knots. Lake waters light chop. A
slight chance of showers in the morning, then a chance of showers
in the afternoon.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers after midnight.
.SATURDAY...Southwest winds around 5 knots. Lake waters smooth. A
slight chance of showers and thunderstorms.
.SATURDAY NIGHT...South winds around 5 knots, becoming northeast
after midnight. Lake waters smooth.
.SUNDAY...East winds 5 to 10 knots, becoming southeast in the
afternoon. Lake waters light chop.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, increasing to
10 to 15 knots after midnight. Lake waters choppy.
.MONDAY...South winds 10 to 15 knots, increasing to 15 to
20 knots in the afternoon. Lake waters rough. A chance of
showers. A slight chance of thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Lake waters rough.
Showers likely. A chance of thunderstorms, mainly in the evening.
.TUESDAY...Southwest winds 5 to 10 knots. Lake waters light chop.
A slight chance of showers and thunderstorms in the morning.
.TUESDAY NIGHT...Southwest winds around 5 knots, becoming north
after midnight. Lake waters light chop. A slight chance of
showers and thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ432-210700-
Calcasieu Lake-
1220 PM CST Thu Nov 20 2025

.TONIGHT...Southeast winds 10 to 15 knots, diminishing to 5 to
10 knots late. Lake waters choppy. Patchy fog late this evening.
Areas of dense fog after midnight. A slight chance of showers and
thunderstorms late this evening. A chance of showers with a
slight chance of thunderstorms after midnight.
.FRIDAY...South winds 5 to 10 knots, becoming southwest 10 to
15 knots with gusts up to 20 knots in the afternoon. Lake waters
choppy. A slight chance of thunderstorms in the morning. A slight
chance of showers.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Lake waters light
chop. A slight chance of showers after midnight.
.SATURDAY...Southwest winds around 5 knots. Lake waters smooth. A
slight chance of showers and thunderstorms.
.SATURDAY NIGHT...West winds around 5 knots, becoming northeast
after midnight. Lake waters light chop.
.SUNDAY...East winds 5 to 10 knots, becoming southeast in the
afternoon. Lake waters light chop.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, increasing to
10 to 15 knots after midnight. Lake waters choppy.
.MONDAY...South winds 10 to 15 knots, increasing to 20 to
25 knots in the afternoon. Lake waters very rough. A slight
chance of showers in the morning, then a chance of showers in the
afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Lake waters rough.
Showers likely with a slight chance of thunderstorms.
.TUESDAY...Southwest winds 5 to 10 knots. Lake waters light chop.
A chance of showers with a slight chance of thunderstorms in the
morning.
.TUESDAY NIGHT...West winds 5 to 10 knots, becoming north after
midnight. Lake waters light chop. A slight chance of showers and
thunderstorms after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ435-210700-
Vermilion and West Cote Blanche Bays-
1220 PM CST Thu Nov 20 2025

.TONIGHT...Southeast winds 10 to 15 knots. Bay waters choppy. A
slight chance of showers late this evening. A chance of showers
with a slight chance of thunderstorms after midnight. Patchy fog
after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A
chance of showers with a slight chance of thunderstorms in the
morning, then a slight chance of showers in the afternoon.
.FRIDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth.
.SATURDAY...Southwest winds around 5 knots. Bay waters smooth. A
slight chance of showers and thunderstorms in the afternoon.
.SATURDAY NIGHT...West winds around 5 knots, becoming north after
midnight. Bay waters smooth.
.SUNDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light
chop.
.MONDAY...Southeast winds 10 to 15 knots. Bay waters choppy. A
chance of showers in the afternoon.
.MONDAY NIGHT...South winds 10 to 15 knots. Bay waters choppy. A
chance of showers in the evening, then showers likely with a
slight chance of thunderstorms after midnight.
.TUESDAY...Southwest winds 10 to 15 knots. Bay waters choppy. A
chance of showers, mainly in the morning.
.TUESDAY NIGHT...Southwest winds around 5 knots, becoming
northwest after midnight. Bay waters light chop. A slight chance
of showers after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ436-210700-
Atchafalaya and East Cote Blanche Bays-
1220 PM CST Thu Nov 20 2025

.TONIGHT...Southeast winds 5 to 10 knots. Bay waters light chop.
A slight chance of showers late this evening. A chance of showers
with a slight chance of thunderstorms after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Bay waters light chop. A
chance of showers with a slight chance of thunderstorms in the
morning, then a slight chance of showers in the afternoon.
.FRIDAY NIGHT...Southwest winds around 5 knots. Bay waters
smooth.
.SATURDAY...Southwest winds around 5 knots. Bay waters smooth. A
slight chance of showers in the afternoon.
.SATURDAY NIGHT...West winds around 5 knots, becoming north after
midnight. Bay waters smooth.
.SUNDAY...Northeast winds around 5 knots, becoming southeast in
the afternoon. Bay waters smooth.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Bay waters light
chop.
.MONDAY...Southeast winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Bay waters choppy. A slight chance of
showers in the afternoon.
.MONDAY NIGHT...South winds 10 to 15 knots. Bay waters choppy. A
chance of showers in the evening, then showers likely with a
slight chance of thunderstorms after midnight.
.TUESDAY...Southwest winds 5 to 10 knots. Bay waters light chop.
A chance of showers, mainly in the morning.
.TUESDAY NIGHT...Southwest winds around 5 knots, becoming north
after midnight. Bay waters smooth. A slight chance of showers
after midnight.

Winds and waves higher in and near thunderstorms.

$$

GMZ450-210700-
Coastal waters from Cameron LA to High Island TX out 20 NM-
1220 PM CST Thu Nov 20 2025

.TONIGHT...Southeast winds 10 to 15 knots, becoming south late.
Seas around 2 feet. Wave Detail: Southeast 2 feet at 5 seconds. A
slight chance of showers. A slight chance of thunderstorms late
this evening and overnight.
.FRIDAY...South winds around 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. A slight chance of showers.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 1 foot at 6 seconds. A chance of showers after
midnight.
.SATURDAY...Southwest winds around 5 knots. Seas around 2 feet.
Wave Detail: South 1 foot at 6 seconds. A slight chance of
thunderstorms in the morning. A slight chance of showers.
.SATURDAY NIGHT...South winds around 5 knots, becoming northeast
after midnight. Seas around 2 feet. Wave Detail: Southeast 2 feet
at 6 seconds.
.SUNDAY...East winds around 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 4 seconds and south 1 foot at 4 seconds.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
A slight chance of showers after midnight.
.MONDAY...South winds around 15 knots. Seas 2 to 3 feet. A chance
of showers. A slight chance of thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas 3 to 4 feet.
Showers likely with a slight chance of thunderstorms.
.TUESDAY...West winds 10 to 15 knots, becoming southwest 5 to
10 knots in the afternoon. Seas 2 to 3 feet. A chance of showers
with a slight chance of thunderstorms in the morning.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots, becoming north
10 to 15 knots after midnight. Seas around 2 feet. A slight
chance of showers and thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ452-210700-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
1220 PM CST Thu Nov 20 2025

.TONIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 4 seconds. A slight chance of
thunderstorms this evening. A chance of showers. A chance of
thunderstorms after midnight. Patchy dense fog after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 5 seconds. A slight chance of showers and
thunderstorms in the morning.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 5 seconds. A slight chance
of showers after midnight.
.SATURDAY...Southwest winds around 5 knots. Seas around 2 feet.
Wave Detail: South 1 foot at 6 seconds. A slight chance of
showers.
.SATURDAY NIGHT...Southwest winds around 5 knots, becoming north
after midnight. Seas around 2 feet. Wave Detail: South 1 foot at
6 seconds.
.SUNDAY...East winds 5 to 10 knots, becoming southeast in the
afternoon. Seas around 2 feet. Wave Detail: Northeast 2 feet at
4 seconds and southwest 1 foot at 4 seconds.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, increasing to
10 to 15 knots after midnight. Seas 2 to 3 feet.
.MONDAY...South winds around 15 knots. Seas 2 to 3 feet. A slight
chance of showers in the morning, then a chance of showers in the
afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas 2 to 4 feet. A
chance of showers in the evening, then showers likely with a
slight chance of thunderstorms after midnight.
.TUESDAY...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 4 feet. A chance of showers
with a slight chance of thunderstorms in the morning, then a
slight chance of showers in the afternoon.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots, becoming north
10 to 15 knots after midnight. Seas around 2 feet. A slight
chance of showers in the evening, then a chance of showers with a
slight chance of thunderstorms after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ455-210700-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
1220 PM CST Thu Nov 20 2025

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 6 PM CST THIS
EVENING THROUGH LATE TONIGHT...

.TONIGHT...Southeast winds 10 to 15 knots. Seas around 2 feet.
Wave Detail: Southeast 1 foot at 3 seconds. A chance of showers.
A chance of thunderstorms after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: South 2 feet at 6 seconds. A slight chance of showers and
thunderstorms in the morning.
.FRIDAY NIGHT...Southwest winds around 5 knots. Seas 1 to 2 feet
in the evening, then 1 foot or less. Wave Detail: South 1 foot at
5 seconds.
.SATURDAY...Southwest winds around 5 knots. Seas 1 foot or less.
A slight chance of showers in the afternoon.
.SATURDAY NIGHT...West winds around 5 knots, becoming north after
midnight. Seas 1 foot or less. Wave Detail: Southwest 1 foot at
3 seconds.
.SUNDAY...Northeast winds 5 to 10 knots, becoming southeast in
the afternoon. Seas 1 foot or less. Wave Detail: Northeast 1 foot
at 2 seconds and southwest 1 foot at 3 seconds.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots. Seas 1 foot or
less, then around 2 feet after midnight.
.MONDAY...Southeast winds 10 to 15 knots. Seas around 2 feet. A
slight chance of showers in the afternoon.
.MONDAY NIGHT...South winds 10 to 15 knots. Seas 2 to 3 feet. A
chance of showers in the evening, then showers likely with a
slight chance of thunderstorms after midnight.
.TUESDAY...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 3 feet. A chance of showers,
mainly in the morning.
.TUESDAY NIGHT...Southwest winds around 5 knots, becoming north
after midnight. Seas around 2 feet. A slight chance of showers in
the evening, then a chance of showers after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ470-210700-
Coastal waters from Cameron LA to High Island TX from 20 to 60 NM-
1220 PM CST Thu Nov 20 2025

.TONIGHT...Southeast winds 10 to 15 knots, becoming south late.
Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 5 seconds. A
slight chance of showers and thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 7 seconds and southwest 1 foot at
4 seconds. A slight chance of showers in the afternoon.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 6 seconds. A slight chance of showers
after midnight.
.SATURDAY...Southwest winds around 5 knots, becoming southeast in
the afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at
6 seconds. A slight chance of showers in the morning.
.SATURDAY NIGHT...Southeast winds 5 to 10 knots. Seas around
2 feet. Wave Detail: South 2 feet at 6 seconds.
.SUNDAY...East winds around 10 knots. Seas around 2 feet. Wave
Detail: East 2 feet at 5 seconds and southwest 1 foot at
5 seconds.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
A slight chance of showers after midnight.
.MONDAY...South winds around 15 knots. Seas 3 to 4 feet. A slight
chance of showers in the morning, then a chance of showers with a
slight chance of thunderstorms in the afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas 3 to 4 feet.
Showers likely with a slight chance of thunderstorms.
.TUESDAY...Southwest winds 10 to 15 knots, diminishing to 5 to
10 knots in the afternoon. Seas 2 to 4 feet. A chance of showers
with a slight chance of thunderstorms in the morning.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots, becoming
northeast 10 to 15 knots after midnight. Seas 2 to 3 feet. A
slight chance of thunderstorms. A slight chance of showers in the
evening, then a chance of showers after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ472-210700-
Coastal waters from Intracoastal City to Cameron LA from 20 to
60 NM-
1220 PM CST Thu Nov 20 2025

.TONIGHT...Southeast winds 10 to 15 knots, becoming south late.
Seas 3 to 4 feet. Wave Detail: Southeast 4 feet at 6 seconds. A
slight chance of thunderstorms this evening. A chance of showers.
A chance of thunderstorms after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 3 to 4 feet. Wave
Detail: Southeast 4 feet at 7 seconds.
.FRIDAY NIGHT...South winds 5 to 10 knots. Seas 2 to 3 feet. Wave
Detail: Southeast 3 feet at 7 seconds and southwest 1 foot at
4 seconds.
.SATURDAY...West winds around 5 knots. Seas 2 to 3 feet. Wave
Detail: South 2 feet at 6 seconds. A slight chance of showers in
the morning.
.SATURDAY NIGHT...Southeast winds around 5 knots, becoming east
after midnight. Seas around 2 feet. Wave Detail: South 2 feet at
6 seconds.
.SUNDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northeast 2 feet at 5 seconds and southwest 1 foot at
5 seconds.
.SUNDAY NIGHT...Southeast winds 10 to 15 knots. Seas 2 to 3 feet.
.MONDAY...South winds around 15 knots. Seas 3 to 4 feet. A slight
chance of showers in the morning, then a chance of showers in the
afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas around 4 feet. A
chance of showers in the evening, then showers likely with a
slight chance of thunderstorms after midnight.
.TUESDAY...Southwest winds 10 to 15 knots. Seas 3 to 4 feet. A
chance of showers, mainly in the morning.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots, becoming
northeast 10 to 15 knots after midnight. Seas 2 to 3 feet. A
slight chance of showers in the evening, then a chance of showers
after midnight.

Winds and seas higher in and near thunderstorms.

$$

GMZ475-210700-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA from 20 to 60 NM-
1220 PM CST Thu Nov 20 2025

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 6 PM CST THIS
EVENING THROUGH LATE TONIGHT...

.TONIGHT...Southeast winds 10 to 15 knots, becoming south late.
Seas 3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast
5 feet at 7 seconds. A slight chance of thunderstorms this
evening. A chance of showers. A chance of thunderstorms after
midnight.
.FRIDAY...Southwest winds 10 to 15 knots with gusts up to
20 knots, diminishing to 5 to 10 knots in the afternoon. Seas
3 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast
5 feet at 7 seconds. A slight chance of showers in the morning.
.FRIDAY NIGHT...Southwest winds around 5 knots. Seas 2 to 3 feet.
Wave Detail: South 3 feet at 5 seconds.
.SATURDAY...West winds around 5 knots, becoming northwest in the
afternoon. Seas 2 to 3 feet. Wave Detail: South 2 feet at
6 seconds.
.SATURDAY NIGHT...North winds 5 to 10 knots. Seas around 2 feet.
Wave Detail: South 2 feet at 6 seconds.
.SUNDAY...East winds 5 to 10 knots. Seas around 2 feet. Wave
Detail: Northeast 2 feet at 6 seconds and southwest 1 foot at
5 seconds.
.SUNDAY NIGHT...Southeast winds 5 to 10 knots, increasing to
10 to 15 knots after midnight. Seas 2 to 3 feet.
.MONDAY...Southeast winds 10 to 15 knots. Seas 2 to 4 feet. A
slight chance of showers in the afternoon.
.MONDAY NIGHT...South winds 15 to 20 knots. Seas 3 to 5 feet,
occasionally to 6 feet. A chance of showers. A slight chance of
thunderstorms after midnight.
.TUESDAY...Southwest winds 10 to 15 knots. Seas 3 to 4 feet. A
chance of showers, mainly in the morning.
.TUESDAY NIGHT...Southwest winds 5 to 10 knots, becoming
northeast after midnight. Seas 2 to 3 feet. A slight chance of
showers in the evening, then a chance of showers after midnight.

Winds and seas higher in and near thunderstorms.

$$